Khan Tengri Bogu of Mongolia

Khan Tengri Bogu of Mongolia (745-779) was the Khan of the Uyghur Khaganate from 759 to 779, succeeding Khan Bayanchur of Mongolia and preceding Khan Alp-Qutlugh of Mongolia. During his rule, the khaganate reached a golden age, having put down the An Lushan Rebellion and converted to Manichaeism.

Biography
Tengri Bogu was born in 745 to the Tengri Yaghlakar Uyghurs, and he was the son of Khan Bayanchur of Mongolia. Tengri Bogu succeeded his father after he died of over-drinking in 759, and during his reign, Tengri Bogu helped Emperor Daizong of Tang in putting down the An Lushan Rebellion and recapturing Luoyang. He came to an agreement with the Tang dynasty, where the Tang would give 40 rolls of silk to the Uyghur Khaganate in exchange for any horse brought to China, and all Uyghurs would not have to pay taxes or accomodation costs as "guests". In 762, he converted to Manichaeism after meeting with priests in Iran while on campaign, and he made it the state religion. The Manichaean Sogdians therefore gained more influence, and in 779 his Sogdian advisers incited Tengri Bogu to plan an invasion of China following the death of Daizong. However, his uncle Tun Bagha Tarkhan opposed the plan, attacking and killing Tengri Bogu. He massacred 2,000 of his family, his clique, and the Sogdians, and took power for himself.